STUDIES IN THE AMERICAN BUPRESTID.E 155 



very densely, uniformly punctured, with two strong median and two 

 sublateral callous vittae, the latter broadly interrupted by the concave 

 impressions, also with a small central callus and an irregular elevation 

 near each side margin; scutellum small, strongly transverse; elytra 

 much wider than the prothorax, three-fourths longer than wide, the 

 sides rather abruptly rounding and strongly oblique in apical third, 

 becoming evidently sinuate near the tips, the latter transversely trun- 

 cate, with the angles not at all rounded, the sutural slightly prominent; 

 surface extremely densely, not coarsely punctate throughout, with 

 unimpressed series of rather large but more or less obscure punctures 

 though coarse and perforate in certain parts near the suture, the alter- 

 nate intervals with moderately elevated and smooth elongate-oblong 

 callous spots, varying greatly in size; under surface ( 9 ) rather coarsely 

 and subrugosely but not very densely punctate, the axial line only 

 feebly impressed, the prosternum broadly, very feebly concave and 

 coarsely, densely punctate throughout, the apex of the fifth ventral 

 narrowly rounded, with two small deep approximate incisures, the me- 

 dian tooth parallel, ^truncate; male not at hand. Length 15. 5-1 6. 5 mm.; 

 width 6.0-6.6 mm. Oregon and Washington State — eight specimens. 

 [ = calif ornica Cr., i. litt .] crassicollis Lee. 



A — Body larger, similar in general form, sculpture and coloration, 

 the head relatively a little smaller, with less prominent eyes, the sur- 

 face more confusedly and strongly rugose, the sides of the elytra 

 more gradually rounding and less strongly oblique in apical two- 

 fifths, the punctured series less distinct; under surface nearly similar; 

 legs stout. Length (9) 17.5 mm.; width 6.9 mm. Washington 

 State hesperica n. subsp. 



Elytral apices more gradually and finely attenuate, very narrow at tip and 

 more or less evidently though but slightly prolonged 4 



4 — Upper surface black, without metallic reflection, at least in morio 5 



Upper surface dark brown, with feeble subcupreous or aeneous lustre, the 

 under surface rather bright cupreous 6 



5 — Body very much as in divaricata (!) but much smaller, the upper surface 

 continently punctured, with only the elevated parts glossy, the lower 

 surface bronzed-copper and glossy; mouth and antenna; bronzed, the 

 eyes black; front sculptured as in divaricata; prothorax uneven, with 

 shallow impressions and a broad dorsal channel, distinctly bisinuate at 

 base; surface with levigated elevations; scutellum very minute, im- 

 pressed ; elytra divaricate, suddenly attenuated at the apices, which are 

 rounded and each with a single ridge; surface rough, with many con- 

 catenated and levigated irregular elevations, the sides of the apices 

 bronzed; breast channeled, the first abdominal segment less conspicu- 

 ously; prosternum nearly an isosceles triangle; abdominal apex with 

 three short teeth. Length 15.5 mm. British America (latitude 65° 

 and in the Rocky Mts.) . [ =Stenuris tencbrosa Kirby]. 



tenebrosa Kirby 



Body oblong, rather stout, moderately convex, dull, deep black throughout 



